Ore classifier and concentrator.



e. o'. MIGHAELSEN. ORE OLASSIPIER AND GONGENTRATOR.

APPLICATION FILED JAN. 24, 1914.

Patented Feb. 2, 1915.

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THE NORRIS PETERS CO.. PHOTO-LITHO., WASHINGTON. D. C.

C. 0. MIHAELSEN. ORB GLASSIFIER AND GONGENTRATOR.

APPLICATION FILED JAN. 24, 1914.

Patented Feb. 2, 1915.

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THE NORRIS PETERS CO1. PHOTG-LITHO.. WASHINGTON, D. C`

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C. 0. MICHABLSEN. ORE GLASSIPIBR AND GONGENTRATOR.

APPLwAjHoH FILED JAN. 24, 1914.

Patented F9112, 1915.

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THF; NORRIS PETERS C0., PHOTO-LITHO.. WASHINGTON. D. C.

C. 0. MIGHAELSEN.

. ORE CLASSIPIBR AND CONGBNTRATOR.

APPLICATION FILED JAN. 24, 1914.

1,126,819. Patented Feb. 2, 1915.

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W, O K 34 O 0 4* C C O Gaag? CHARLES O. MICHAELSEN, 0F OMAHA, NEBRASKA.

ORE CLASSIFIER AND CON-GENERATOR.

Specification of Letters Patent.

PatcntedlFe-b. 2, 1915.

Application filed January 24, 1914. Serial No. 814,228.

T0 fzZZ 1/72 om it m07/ concern Be it known that l, CHARLES O. MICHAEL- snN, a citizen of the United States. and a resident of Omaha, in the county of Douglas and State of Nebraska, have invented certain new and useful improvements in Ore' Classifiers and Concentrators, of which the following` is a specification.

My invention relates to ore washing, separating, classifying and concentrating machines.

It is the object thereof to provide a machine adapted to handle large quantities of ore containing, together with rock, gravel, sand or the like, a certain proportion of valuable mineral constituents in finely divided form and of greater specific gravity than the valueless constituents; the machine being adapted to classify or separate the material into two parts of which one will contain practically all of the valuable material; so that the bulk of material to be handled subsequently by other machines, or to be directly smelted or refined, will be greatly reduced.

A machine embodying my invention is illustrated in the accompanying drawings, in which- Figure 1 is a longitudinal vertical section thereof, Fig. 2 is a plan view of the same, with certain parts broken away to show the interior, Fig. 3 is a transverse vertical section on the plane of the line of Fig. 1, Fig. 4 is a detail end view of a part of the cradle device, and Fig. 5 is a detail plan view of a part of the cradle actuating means, with parts broken away.

In the construction of the machine illustrated, I provide a horizontal tubular main shaft 1 which is journaled in suitable bearings Q carried in standards 3, e and 5. Said standards are mounted on suitable foundations such as blocks 6 of concrete. In the upper part of the standards 4 and 5 is journaled a drive-shaft carrying at its ends flywheels 7 which may be employed as pulleys and connected by belt with a suitable source of power. 0n the central part of the driveshaft is a pinion 8 which meshes with a gear 9 carried by a shaft journaled in the intermediate parts of the standards. rThe gear 9 meshes with a gear 10 mounted concentrically with the tubular shaft 1 on a hub-body 11 secured to said shaft as shown. The gears 9 and 1G carry interfering rollers 1'2, and the gear 10 and hub-body 11 are yieldingly connected to each other, all in the manner shown and fully described in Letters Patent No. 1,085,751, issued to me February 3, 1914, for interrupted drive gearing. By said drive gearing, continuous rotary movement imparted to the drive-shaft, pinion 8 and gear 9, ca'uses an intermittent or alternately retarded and accelerated rotary Inoveinent of the tubular shaft 1.

0n the end of the bearing 2 carried by the standard 5 is secured an annular plate 13 with which is connected a feed-pipe 1J: of which the end extends into the tubular shaft as shown. The materials to be operated upon by the machine are supplied through the pipe 14, together with a suitable quantity of water.

In the tubular shaft at some distance beyond the end of the feed-pipe 14- is a plug 15, and in the sides of the shaft between the plug and the end of the pipe are ports 16 through which the material supplied through the feed-pipe escapes from the shaft into a distributing-chamber 17. Said chamber is formed within a shell 18 of which one end is carried upon an end-plate 19 secured to the shaft near the bearing-standard 4, and the other end is carried upon a spider Q0 secured upon the shaft as shown. T he shell 18 is frusto-conical in form, being smallest in diameter at the end-plate and largest at the spider, so that the lower side of the shell is slightly inclined downwardly from the endplate to the spider. The one end of the distributing-chamber is closed by the end-plate 19 and the other end of the chamber is partly closed by a circular baille or check-plate 21. rlhe latter has a hub-portion which tits slidably on the shaft and is adjustable longitudinally thereon to vary the capacity of the distributing-chamber. The diameter of the check-plate is less than the internal diameter of the shell 18, so that an annular opening or port is left between the shell and the edges of the plate. Owing to the tapering or conical form of the shell the width of said annular port is varied more or less by adjustments of the check-plate longitudinally of the shaft.

To the end of the shell 18 adjoining the spider 2O is connected a shell, having a conical portion 22 of which the smaller end fits over the end of the shell 18, and a cylindrical portion E23 integral with the conical portion and extending horizontally from the larger end of the conical portion.

Adjoining the open end of the cylindrical shell-portion 23 is a ring 2l having a conical flange, or annular outwardly flaring lip, 25 of which the outer diameter is the same as the intei'nal diameter of the cylinder 23. The ring 24 is carried on a spider 26 which is slidable longitudinally on the shaft l.

To the hub of the spider is secured a threaded sleeve 27 which is engaged by an internally threaded collai' 28. l1`he other end of the collar 23 engages a second threaded sleeve 29 secured to the hub of a checliplate 30 which is lixedly secured to the shaft 1 adjacent to the bearing-standard 3, as shown. rlhe threads of the opposite ends of the collar 26 and of the respective collars 27 and 29 are opposite in direction. The collar has in its outer surface suitable openings for engagement by a Spanner-wrench, by which the collar may be turned to adjust the position of the spider 26 and ring 24 longitudinally of the shaft 1.

lhe space 31 within the cylindrical shellportion 23 will be herein designated as the cradle-chamber. Within said chamber on the shaft 1 is secured a sleeve 32. A spline in one side of the shaft l extends through said sleeve, and through the hubs of the check-plate 30, the spider 26, the spider 20, the check-plate 2l and end-plate lt), securing all of said parts against rotary moven'ient relatively to the shaft. Around the sleeve 32 is disposed a collar comprising a lower body-portion 3l and a separable capportion 35, and between said collar and the sleeve 32 is arranged a rollei'-beaiing 36. rlhe cap 35 is provided with an oil-cup 37 for lubricating the bearing.

In the lower bodyportion 34 of the collar are several longitudinal openings in which rods 38 are secured by means of the set-screws 39. Said rods emerge from the end of the collar adjacent to the spider 20, curve downwardly in planes radial to the shaft 1, and have end-portions 40 which extend horizontally adjacent to the inner surface of the cylindrical shell-portion 23. 'The rod-portions or arms 40 are preferably flattened in planes radial to the shaft, as shown in Fig. 3. The several rods and the collar, taken together, constitute a swinging cradle or agltating device, which is retained by gravity within the lower part of the cradle-chamber, the weight of the rods and of the lower body-portion of the collar causing the collar to remain relatively stationary while the shaft and sleeve 32 revolve within it.

As a further means of retaining the cradle within the lower part of the chamber, there is provided at the side of the collar, adjacent to the upwardly moving side of the shell 23, an arm 411 on which a counterweight l2 is adjiistably secured, as shown in Fig. 3.

In order to impart a certain oscillating movement to the cradle, yielding actuating means are provided for intermittently swinging the same in the direction of rotation of the shaft 1, said yielding actuating means becoming disconnected intermittently as the resistance to such movement of the cradle exceeds a predetermined amount. Said actuating means are as follows: 0n one end of the cradle-collar formed by the parts 3l and 35 is secured a plate 13 on the face of which are a plurality of V-shaped lugs 11. A plate 4-5 having similar lugs 16 thereon is held slidably on the sleeve 32 by a short spline or key 47, the lugs on the two plates being on the adjoining sides thereof, as shown in Fig. 5. A helical spring i8 engages the plate l5 to push the same toward the plate 43, the spring being inclosed by a casing-tube 49 and said casing-tube being carried by and integral with a collar 5L) which is fixedly secured to the sleeve On the end of the sleeve 32 adjoining the spider 20 a thrust-collar 51 is secured to the sleeve, and between said collar and the end of the cradle-collar is a ball thrustbearing 52. The pressure of the helical spring 18 against the plate 45 holds the lugs il and 16 normally in interengaging position, the longitudinal pressure upon the cradle-collar being received by the ball i; thrust-bearing and the collar 51. As the Q shaft 1 and sleeve 32 are revolved the inclined faces of the lugs engage each other S0 that the plate 45, being actuated by the key 47, tends to rotate the cradle with the shaft. As the cradle swings upwardly, however, the weight thereof offers a progressively increasing resistance to the movement, which causes the spring 4S to be compressed by the longitudinal pressure on the plate 45 resulting from the pressure of the inclined faces of the lugs fll upon the similar faces of the lugs 46. Finally, a position of the cradle is reached at which the resistance is such that the compression of the spring A will be sufficient to allow the adjacent pairs `of the lugs 44 and 46 to slip past each other.

The cradle then swings downwardly until the lugs again come into contact with each other, whereupon the upward swinging movement is again commenced.

In the use of the machine the ring 2-1 is adjusted to a position on the shaft 1 such that the outer edge of the conical lip 24 is very close to the end of the shell 23, a narg f as represented in rig. 3, and which open up passages through the same which facilitate the descent of the heavier materials to the bottom of the mass. The heavier and more valuable material, which, in the class of materials operated upon by the machine,is mostly in a finely divided state, passes out through the annular slit between the lip 25 and the end of the shell 23, being received in a suitable trough or chute 53, as shown in liig.

i l. rThe rock and the like, being lighter and also being mainly in larger pieces, remains at the top of the mass of material in the cradle-chamber, and passes out over the barrier formed by the lip 25, and through the discharge opening provided by the open end of the ring 24, being received in a trough or chute 5l disposed below the end of said ring.

In addition to the water supplied with the material through the feed-pipe la, it is desirable to have a quantity of water supplied directly to the cradle-chamber. For this purpose a water-pipe 55 is inserted between the check-plate 30 and the end of the ring 24, said pipe having at its end a bent nozzle 56 adapted to direct a stream of water A against the side of the cradle-chamber on the upwardly-moving side of the shell, as represented in Figs. 2 and 3. The stream directed to this point also serves to wash the material down into the bottom of the chamber and prevents it being carried up by the rotating shell. ln order to interfere as little as possible with the water-stream A, the arms of the spider 26 are made oval in section, but quite `liat, and with their greatest thickness in planes parallel with the main shaft.

Now, having described my invention, what I claim and desire to secure by Letters Patent is:

l. In a machine 0f the class described, a horizontally disposed cylindrical shell, actuating means for intermittently rotating the shell, an annular barrier partly closing one end of the shell, there being a narrow annular aperture between said barrier and the end of the shell, means for feeding materials into the end of the shell opposite the barrier, and means for agitating the materials in the lower portion of the chamber within the shell.

2. ln a machine of the class described, a horizontal revolubly mounted shaft, means for revolving the same intermittently, a cylindrical shell carried by the shaft concentrically therewith, a ring of smaller diameter than the shell and carried by the shaft adjacent to an open end of the shell, a conical lip on the ring extending into close proximity to said end of the shell so that a narrowT annular aperture is formed between them, and means for feeding materials into the shell.

3. In a machine of the class described, the combination with a horizontally disposed `cylindrical shell, and actuating means for revolving the same with an alternately retarded and accelerated movement, of a ring smaller in diameter than the shell and disposed concentrically therewith adjacent to an open end thereof, a lip on the ring extending toward the end of the shell so that a narrow annular slit is left between them,

agitating means within the shell, means for feeding materials into the shell, and means substantially closing the end of the shell opposite the ring.

et. In a machine of the class described, an intermittently rotating cylindrical shell disposed on a horizontal axis, a tubular shaft extending through the shell, means for feeding materials through the tubular shaft into one end of the shell, a barrier concentric with the shell for partially closing the other end of the same, there being a uniform annular opening between said barrier and the end of the shell, and means for adjusting said barrier longitudinally of the shaft to vary the width of the annular opening.

5. In a machine of the class described, a.

horizontal rotating shaft, means for actuating the same intermittently, a substantially cylindrical casing carried thereby, said casing being partially open at one end and having an annular slit in its peripheral portion adjacent to said end, means for feeding materials into the casing, and a swinging cradle carried on the shaft within the casing and having arms extending into the lower part thereof for agitating materials therein.

6. In a machine of the class described, a horizontally disposed substantially cylindrical casing having one end partially open and an annular peripheral aperture adjoining said end, means for revolving said casing with an alternately retarded and accelerated movement, a swingable cradle carried within the casing and having parts cxtending along the lower peripheral part thereof, means for feeding materials into the casing, and means for oscillating the cradle.

7. In a machine of the class described., a horizontally disposed rotating shaft, a substantially cylindrical casing carried thereon, the casing being partially open at one end and having a peripheral aperture adjoining said end, a cradle having a plurality of arms extending into the lower part of the casing and carried on the shaft so as to be swingable thereon, means for feeding Ina-Ak terials into the easing, yieldable actuating means Carried on the shaft and engaging the vcradle to swing the same upwardly 'from a normal dependent position, and a counterweight on the cradle for controlling the resistance thereof to the yielding actuating means. l

8. in a machine oi the class described, a horizontal `revolubie substantially cylindrical Casing having two discharge openings vconcentric therewith, one of said openings being of smaller radius than the other v whereby a part of the latter opening will be constantly at a lower level than any part of the first, means for revolving the casing with an alternately retarded and accelerated CHARLES O.

Witnesses:

D. O. BARNELL, WVM. B. Dimmi.

MICHAELSEN.

Copies of this patent may be obtained for iive cents eah, by addressing the Commissioner of Patents. Washington, D. C. 

